fix: AREX does not return an error if delegation not found

src/DIRAC/Resources/Computing/AREXComputingElement.py

@@ -294,7 +294,7 @@ def _getDelegationIDs(self):
         result = self._request("get", query)
         if not result["OK"]:
             self.log.error("Issue while interacting with the delegations.", result["Message"])
-            return S_ERROR("Issue while interacting with the delegations")
+            return S_OK([])
         response = result["Value"]
 
         # If there is no delegation, response.json is expected to return an exception
@@ -422,9 +422,9 @@ def submitJob(self, executableFile, proxy, numberOfJobs=1, inputs=None, outputs=
 
         self.log.verbose(f"Executable file path: {executableFile}")
 
-        # Get a delegation and use the same delegation for all the jobs
+        # Get existing delegations
         result = self._getDelegationIDs()
-        if not result["OK"]:
+        if result["OK"]:
             self.log.error("Could not get delegation IDs.", result["Message"])
             return S_ERROR("Could not get delegation IDs")
         delegationIDs = result["Value"]